package com.java2207.group1.controller;

import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.read.builder.ExcelReaderBuilder;
import com.alibaba.excel.read.builder.ExcelReaderSheetBuilder;
import com.alibaba.excel.util.FileUtils;
import com.alibaba.excel.write.builder.ExcelWriterBuilder;
import com.alibaba.excel.write.builder.ExcelWriterSheetBuilder;
import com.java2207.group1.bo.BreakfastBo;
import com.java2207.group1.bo.LunchBo;
import com.java2207.group1.common.LayuiPageVo;
import com.java2207.group1.common.R;
import com.java2207.group1.listener.WebLunchListener;
import com.java2207.group1.pojo.Lunch;
import com.java2207.group1.service.LunchService;
import com.java2207.group1.util.OssUtil;
import com.java2207.group1.vo.Breakfast.BarVo;
import com.java2207.group1.vo.Breakfast.PieVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;

/**
 * @author AL 2022/7/26  20:36
 */
@RestController
@RequestMapping("/lunch")
public class LunchController<webLunchListener> {

    @Autowired
    private LunchService lunchService;

    @Autowired
    private WebLunchListener webLunchListener;

    @RequestMapping("/addLunch")
    public R addLunch(Lunch lunch) {

        int result = lunchService.addLunch(lunch);
        if (result == 1) {
            return R.ok();
        } else {
            return R.error();
        }
    }
    @RequestMapping("/deleteLunch")
    public R deletelunch(Integer id){

        int result = lunchService.deleteLunch(id);
        if (result == 1){
            return R.ok();
        }else{
            return  R.error();
        }
    }
    @RequestMapping("/updateLunch")
    public R updateLunch(Lunch lunch){

        int result = lunchService.updateLunch(lunch);
        if (result == 1){
            return R.ok();
        }else{
            return  R.error();
        }
    }
    @RequestMapping("/lunchList")
    public LayuiPageVo<Lunch> LunchpageDate(@RequestParam Map<String,Object> params){
        return lunchService.lunchPageDate(params);
    }

    @RequestMapping("/upload")
    public R uploadPic(MultipartFile file) throws IOException {

        if (file != null) {
            String originalFilename = file.getOriginalFilename();
            InputStream inputStream = file.getInputStream();
            String url = OssUtil.uploadFile(inputStream, originalFilename);
            return R.ok().data("url", url);
        }
        return R.error();
    }
    @RequestMapping("/echartsBar")
    public R echartsBar() {
        List<BarVo> list = lunchService.nameBarData();
        return R.ok().data("nameBar", list);
    }

    @RequestMapping("/echartsPie")
    public R echartsPie() {
        List<PieVo> list = lunchService.namePieData();
        return R.ok().data("namePie", list);
    }
    @RequestMapping("/export")
    public void export(Map<String,Object> params, HttpServletResponse response) throws IOException {
        // 设置表格的响应头
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");

        // 下载的文件名 是中文 要进行转码 不然会乱码
        String filename = URLEncoder.encode("早餐信息导出", "utf-8");

        // 告诉浏览器 下载文件
        response.setHeader("Content-Disposition","attachment;filename="+filename+".xlsx");

        // 得到浏览器的输出流 像浏览器写输出
        ServletOutputStream outputStream = response.getOutputStream();

        ExcelWriterBuilder write = EasyExcel.write(outputStream, BreakfastBo.class);

        ExcelWriterSheetBuilder sheet = write.sheet();

        // 准备满足条件的集合数据
        List<LunchBo> lunchs =  lunchService.lunchExcelData(params);
        //  把集合数据写到输出流
        sheet.doWrite(lunchs);
    }

    @RequestMapping("/templateDownload")
    public void templateDownload(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //下载excel 的 响应头
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
        //读取服务器上的模板文件 写到浏览器
        //得到模板文件的路径
        String realPath = request.getServletContext().getRealPath("/template/早餐信息模板.xlsx");

        //根据文件路径 创建File 对象
        File file = new File(realPath);

        // 把File  对象转为 字节数组
        byte[] bytes = FileUtils.readFileToByteArray(file);
        // 下载的文件名 是中文  要进行转码  要不然会出现乱码
        String filename = URLEncoder.encode("午餐信息模板", "utf-8");

        // 告诉浏览器  下载文件
        response.setHeader("Content-Disposition","attachment;filename="+filename+".xlsx");

        //得到指向浏览器的输出流  向浏览器写输出
        ServletOutputStream outputStream = response.getOutputStream();
        // 把字节数组 输出到浏览器
        outputStream.write(bytes);

        outputStream.close();
    }

    // 读取excel 文件数据 存到数据库中
    @RequestMapping("/import")
    public R importExcel(MultipartFile file) throws IOException {
        // 避免遇见请求报错
        if(file!=null){
            /**
             * 参数1  文件流
             * 参数2  读取到的数据封装到哪个数据类型中
             * 参数3  监听器  每读取一行数据 就会调用监听器中的 invoke  方法
             * */
            ExcelReaderBuilder read = EasyExcel.read(file.getInputStream(), LunchBo.class, webLunchListener);
            // 得到 sheet 对象
            ExcelReaderSheetBuilder sheet = read.sheet();
            // 读取sheet
            sheet.doRead();

        }
        return R.ok();
    }
}
